Willie leslie pueves



(No Model.)

W. L. PURVES.

FEED MECHANISM FOR SHINGLE MACHINES.

No. 339,808. Patented Apr. 13, 1886.

WITNESSES: INVENTOR:

ATTORNEYS.

N. PETERS. Phmmlillwgriphnn Waxhinglon. D. C.

UNITED STATES PATENT @irrrcn.

\VILLIE LESLIE PURVES, OF \VADDINGTON, NE\V YORK.

FEED MECHANISM FOR SHlNGLE-MACHINES.

SPECIFICATION forming part of Letters Patent No. 339,808, dated April 13, 1886.

Application filed January 15, 1886. Serial No. 189,755.

To (tZZ whom it may concern:

Be it known that I, \VILLIE LESLIE PUR- vEs, of \Vaddington, in the county of St. Lawrence and State of New York, have invented a new and useful Improvement in Feed Mechanism for Shingle-Machines, of which the following-is a specification, reference being had to the annexed drawings, forming a part thereof, in which Figure l is a plan view. Fig. is a side elevation of a shingle-machine to which my improved feed mechanism has been applied.

Similar letters of. reference indicate corresponding parts in the different figures of the drawings.

My invention consists in the construction and arrangement of parts, as will be hereinafter fully described and specifically claimed.

A shingle-machine, A, is of the ordinary kind, having a saw, B, mounted on a mandrel and revolving in a vertical plane, and a swing ing block-carrying frame or carriage, C, suspended from the arm D, and arranged to move above the concave bed-piece E and carry the block F, which is swung past the edge of the saw in the operation of removing a shingle from the block.

At the outer end of the curved bed E is ournaled a pulley, a; and a rope, b, attached to the swinging frame 0 and extending over the pulley a, is secured at its lower end to a weight, a, which returns the swinging frame U to the position of starting.

Near the machine A is journaled a shaft, G, carrying at one end a large pulley, d, and atthe opposite end a friction-roller, e, which is located about opposite the swinging frame 0.

In front of the saw B, and in the standard H, is pivoted a lever, I, which extends in one direction from its pivot under the shaft G, and is forked to receive the roller f, which is journaled on a pin passing through the fork. The opposite end of the lever I reaches forward to a point near the swinging frame 0, and is pressed upward by a spring, 9, which tends to move the roller f away from the roller 6.

By the side of the longer arm of the lever I, and near the swinging frame 0, is placed a vertical hand-lever, J, which is pivoted to the floor, and is provided at about its midlength with an arm, h, which reaches over the (No model.)

, top of the lever I. The upper end of the lever J is provided with a handle, 1, which is grasped by the sawyer.

To a short arm, j, projecting from the bottom of the swinging frame 0, is pivoteda bar, ,k, which passes between the rollers c f and i rests normally upon the roller f.

The shaft G receives its motion directly from the mandrel, or through a counter-shaft, I Z, and belts m n. The shalt G is constantly rotated in the direction indicated by the arrow, and when it is desired to move the swinging carriage 0 forward, to bring the block F into engagement with the periphery of the saw, the sawyer presses forward the lever J, bringing the arm it into engagement with the lever I, pressing the roller f against the bar it, thus causing the bar it to bear upon the periphery of the roller 6 with sufficient pressure to cause the bar it to be carried forward by friction, thus drawing the swinging frame 0 toward the saw, and bringing the block F under the action of the saw.

The rapidity with which the frame 0 is moved forward depends upon the amount of pressure exerted upon the bar 70, as the shaft G is arranged to revolve with a speed sufficient for the fastest feed required, and when a slow feed is required the roller e is allowed to slip more or less upon the bar It. After the shingle has been detached from the block F the lever I is released, when the weight 0 returns the swinging frame 0 and the bark to the point of starting, when the sawyer will move forward the block F into a position for another-cut, when tluroperation just described will be repeated.

It is obvious that by extending the longer arm of the lever I the lever, if desired, may be operated by the pressure of the foot, and the lever J may be dispensed with.

I am aware that it is not broadly new to feed the saw .by a bar passed between two friction-rolls; also, that the saw-feeding bar has been operated by rack and pinion, and I do not claim such constructions, broadly, as of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

The feed mechanism for shingle-machines,

consisting of the swinging frame 0, hung in 1o forward end extending to a point adjacent to front of the saw and having the arm j on its to separate the two friction-wheels, the lever lower end, the curved bed-piece E, having a J, having the bar h rest-ingon the upper side pulley, a, on its front end, the Weighted rope ofthe lever I at its front end, and the bar I: connected to the frame 0 and passed over pivoted to the armj 0f the swinging frame 0 x5 pulley a, the shaft Gin rear of the saw, and and extended rearward bet-ween the two fricprovided with the drive-pulleyd and (the friction-rollers, a1] constructed and combined sub tion-wheel e, the standard 11, the lever I, pivs'tantially as set forth. oted to the said standard and having the 'WILLIE LESLIE PURVES. friction-wheel f pivoted on its rear end, the Witnesses:

I E. J. HoY',

DAVID H. PURVES.

the front of the machine, the spring 9, tending 

